Two pipes P and Q can fill a tank in 3 hrs. and 4 hrs. respectively. If both pipes are opened together, then after what time, should P be closed so that the tank is full in 2 hrs. from the start

Two pipes P and Q can fill a tank in 3 hrs. and 4 hrs. respectively. If both pipes are opened together, then after what time, should P be closed so that the tank is full in 2 hrs. from the start
1). 1 hr. 10 min
2). 1 hr. 15 min
3). 1 hr. 20 min
4). 1 hr. 30 min

---

Join Telegram Group

Other Questions

1. A can do a piece of work in 12 days and B can do it in 18 days. They work together for 2 days and then A leaves. How long will B take to finish the remaining work ?

2. P and Q can finish a work in 20 and 5 days respectively. Q starts the work and leaves it after 1 day. If the work is then continued by P, the number of days in which P can complete the rest of the work is:

3. Given below are two quantities named A and B. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose among the possible answers. Quantity A: Sammy is twice as good workman as Billy. Sammy finished a piece of work in 6 hours less than Billy. In how many hours could they have finished that piece of work working together? Quantity B: 5

4.  8 men can do a piece of work in 12 days. 4 women can do it in 48 days and 10 children can do it in 24 days. In how many days can 10 men, 4 women and 10 children together complete the piece of work?

5.  If 13 men can complete a piece of work in 36 days, then in how many days will 18 men complete the same work ?

6. A can do 75% of a job in 18 days and B can do 25% of the job in 12 days. If they work on it together, in how many days can they do 75% of the job?

7. A work could be completed in 100 days by some workers. However, due to the absence of 10 workers, it was completed in 110 days.The original number of workers was :

8. M takes 60% more time than N to complete a wall. If together they complete the wall in 24 days, then how many days will N alone take to complete it?

9. Sandy and Mandy do ($\frac{8}{13}$)th part of a work and the rest of the work was completed by Andy. If Sandy, Mandy and Andy take the same work for Rs 2600, then what is the share (in Rs) of Andy?

10.  If 4 men or 6 boys can finish a work in 20 days. How long will 6 men and 11 boys take to finish the same work?